That sounds more like a system issue than something with Airtable itself. When is the last time that you restarted your browser and/or computer? I’ve noticed odd things creeping in from time to time if I leave Airtable open continuously (I’m using the desktop app on a Mac, but I imagine similar behavior could occur in a browser), so I’m in the habit of refreshing/rebooting frequently. If that doesn’t solve it, I recommend reaching out to Airtable support directly.
Very strange. I use the desktop app more than the web interface, so that might explain why I’m not seeing it. Do you have any extensions active in Chrome? If so, you might consider disabling them and see if that affects anything. Regardless I definitely suggest that you contact Airtable support about this while you’re running other tests.